As frontman Billie Joe Armstrong continues his stint in rehab, the punk rock band puts their tour on hold.

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Frontman Billie Joe Armstrong of Green Day performs onstage during the 2012 iHeartRadio Music Festival at the MGM Grand Garden Arena on September 21, 2012 in Las Vegas, Nevada.

Updated at 11:00 AM PDT on Monday, Oct 29, 2012

Green Day is putting frontman Billie Joe Armstrong's health first.

The punk rock band announced Monday that they are canceling all dates for their 2012 concert tour as the 40-year-old star continues his stint in rehab. They will also postpone all future appearances scheduled for January and February of 2013.

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"Obviously the timing for this isn't ideal, but Billie Joe's well-being is our main concern," bassist Mike Dirnt said in a statement. "We are happy to say that Billie Joe is doing well, and we want to thank you all for the outpouring of support and well wishes that we have received, and we can't wait to see you all again soon.

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The tour was originally set to launch on Sept. 26 in Seattle. Tickets for the 2012 club shows will be refunded, and new dates for the 2013 appearances will be announced shortly.

As a thank-you to their fans for their continued support, Green Day also announced they will move up the release date of Tre!--their third installment in a trio of albums--to Dec. 11 (it was originally set to launch Jan. 15).

"We feel bad we have to delay our tour, so to make up for it we want to give our fans the music earlier than we had planned," said drummer Tr Cool. "If we couldn't be there to play it for you live, the least we could do was give you the next best thing."

Billie Joe Armstrong checked into rehab for substance abuse in late September following his onstage meltdown at the iHeartRadio music festival in Las Vegas.